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• php multi-dimensional array remove duplicate 7 answers

i need help on filtering my 2 dimensional array such as example below:

array(29) { 
    [0]=>  array(2) { 
        [0]=>  string(16) "Andorra La Vella" 
        [1]=>  string(2) "AD"
    }
    [1]=>  array(2) { 
        [0]=>  string(16) "Andorra La Vella" 
        [1]=>  string(2) "AD" 
    }
    [2]=>  array(2) { 
        [0]=>  string(16) "Andorra La Vella" 
        [1]=>  string(2) "AD" 
    }
    [3]=>  array(2) { 
        [0]=>  string(16) "Andorra La Vella" 
        [1]=>  string(2) "AD" 
    }
    [4]=>  array(2) { 
        [0]=>  string(12) "Les Escaldes" 
        [1]=>  string(2) "AD" 
    }...

how do i filter any redundant value from my array? such as key[0] has the same value as key[1][2][3] and i want to remove this redundant value from my array.

i tried array_filter() but no luck. i tried array_splice() and unset(), no luck in either one.

does php provides any native array function for this?

thanks,
aji

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Answer 1

Can array_unique() do this? Not sure if it works with nested arrays.

EDIT: no, it can't do it.

Note: Note that array_unique() is not intended to work on multi dimensional arrays.